(i) Here B = 4 as when we subtract 3 from 7 that is 7-3 = 4 and 3 + 4 = 7
(ii) here A = 5 as only 6 + 5 = 11
From 11 the one`s place 1 has been written down, and another ten`s place 1 has been carried over to the ten`s place of given question
So the value of B = 4
(iii) Here A is occurring at all the three places (in the question and answer)
⇒ A could take values1, 5 and 6
If we take A = 1 then the answer would be 21 × 1 = 21 which is not in accordance the given solution
If A = 6 then the sum becomes 26 × 6 = 156 which is not the solution
So A = 5
As 25 × 5 = 125
(iv) Here all the A are the same in the question as well as answer
So A can take the only value as 0 as 0 + 0 = 0
Which is the only solution?
(v) here A is coming in question and answer both so
Values A can have are 0 and 1
With A = 0 the sum becomes 10 × 10 = 100
So if the value of A = 0 then B = 0
And if we take value of A = 1, the sum is 11 × 11 = 121
So if A = 1 and then B = 2
(iv) Here A can take value of 1, 5 or 6
Now if A = 1 then the multiplication would be 31 × 1 = 31 which is not the solution
If A = 5 the multiplication would be 35 × 5 = 175 which is not the solution again
If A = 6 then the multiplication becomes 36 × 6 = 216
which satisfies the condition of the solution
⇒ A = 6 and B = 1
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